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English definition of “flat”

flat

adjective (DRINK)    /flæt/ (flatter, flattest)
C2 describes a drink that has stopped being fizzy (= with bubbles): If you don't put the top back on that bottle of beer, it will go flat. → Compare still adjectiveDrinks - general words
(Definition of flat adjective (DRINK) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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